______,Place the onion in a bowl, and pour on boiling water to cover.,Drain immediately, rinse with cold water and transfer to the bowl with the dressing.,Steam the potatoes above one inch of boiling water for 10 to 15 minutes until tender.,Remove from the heat, and toss gently with the onion.,Season to taste with salt and pepper.,Add the remaining ingredients and toss together.,Refrigerate for at least one hour before serving.